COMMON STOCK (Tables)

12 Months Ended

Dec. 31, 2020

Stockholders' Equity Note [Abstract]

Schedule of Common Stock Shares Issued and Outstanding

The following shares were issued and outstanding at December 31:

	2020	2019	2018
Beginning of Year	92,394,155	85,506,218	79,549,080
New Issuances During Year:
Settlement of Equity Forward Sale Agreement	—	6,779,661	—
Stock-Based Compensation Plan	75,502	108,276	67,308
Public Equity Offering	8,122,283	—	5,889,830
End of Year	100,591,940	92,394,155	85,506,218

Schedule of Convertible Units

The convertible units consisted of the following (in thousands):

	2020		2019		2018
Principal amount:
Principal (A)	$	287,500	$	287,500	$	287,500
Unamortized debt discount and issuance costs (A)	7,181		7,737		8,269
Net carrying amount	$	280,319	$	279,763	$	279,231
Carrying amount of the equity component (B)	$	—	$	—	$	—

(A) Included in the consolidated balance sheets within Long-Term Debt.

(B) There is currently no equity portion.